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From what we have learned from mining bitcoin back in 2013 to mining ethereum now is that the GPU's that mine Ethereum produce a lot less heat then the SHA256 equipment we used for bitcoin but we have an open rig design to allow air flow to take away heat.
Also, the rigs are located in the mountain area east of Albuquerque thus it is cooler then here in the city. It is about 1000 feet higher in elevation (almost 7000 feet) then the city. I don't know if this helps but i am going to ask my friend more about this.
I do love solar since it helps to nullify the electricity costs if planned around. My previous job i designed solar systems for homes and businesses thus know how to calculate how much solar is needed to cover any electric usage (i designed my own system on my house).

Ooooo... living in Washington state we doesn't seem to produce the same amount of solar energy. I was thinking about doing some experiment around solar power at my house.

@krayzie29 Do you recommend any kit or product that are use for measuring solar power?

There are a few tools out there that will give you your exact solar insolation hours for your area. I'll post a few links at the bottom of the post. When i designed systems at Affordable Solar Group here in Albuquerque, i would design the systems over the phone so i would use the customer/businesses zip code and basic roof information (really just the pitch of the roof or if it is a flat roof) and the following website:

http://pvwatts.nrel.gov/

I haven't designed a system in a few years but the physics and principles don't change, just the products. To design a full system, all that is needed after figuring out the insolation hours for your spot is how much energy per day on average you want the system to cover. Since solar can last 25+ years (solar panel warrantees and inverters have 25 year warrantees), i would add aging factors to the equation to get a system that should produce well for 20 years at least (prob not needed for mining though honestly).

Sorry for the long reply, but here are devices that do what the website i sent you do to your exact site instead of the average of the zip code used. The first one i list is one that i used when i taught PV (photovotaic) system design classes at the local community college. Honestly, the website gives a solid number that can be adjusted to fit the locality better and i am always happy to help with anything like this since i have 7 years of PV design experience:

http://www.solarpanelstore.com/solar-power/tools/meters/daystar_ds_05_solar_meter.html?_vsrefdom=adwords&gclid=CMaOy8vb8NQCFRW4wAodGEMP2w

https://www.solarmeter.com/model100.html?utm_source=google&utm_medium=cpc&utm_content=10.0PVSunLight&gclid=CI3pi9nb8NQCFU-2wAodtk0IVg

https://www.grainger.com/product/39N145&AL!2966!3!50916779277!!!g!81031937157!?gclid=CJDl4eLb8NQCFQOBaQodSTIN5w&cm_mmc=PPC:+Google+PLA?campaignid=175664997&s_kwcid=AL!2966!3!50916779277!!!!81031937157!&ef_id=WVkGBwAAAICYOwPA:20170704225219:s